Books in Biology (sorted by popularity)
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- On the Origin of Species By Means of Natural Selection Charles Darwin 3437 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 1333 downloads
- The Origin of Species by Means of Natural Selection Charles Darwin 1211 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 509 downloads
- Explanation of Terms Used in Entomology John Bernhard Smith 389 downloads
- Our Vanishing Wild Life: Its Extermination and Preservation William T. Hornaday 322 downloads
- An Elementary Study of Insects Leonard Haseman 319 downloads
- Social Life in the Insect World Jean-Henri Fabre 316 downloads
- On the Origin of Species Charles Darwin 310 downloads
- Zoonomia; Or, the Laws of Organic Life, Vol. I Erasmus Darwin 271 downloads
- The Foundations of the Origin of Species Charles Darwin 270 downloads
- The Variation of Animals and Plants under Domestication Charles Darwin 267 downloads
- The History of Insects Unknown 254 downloads
- Birds of the Indian Hills Douglas Dewar 241 downloads
- What is Darwinism? Charles Hodge 216 downloads
- Our Common Insects A. S. Packard 209 downloads
- Wild Nature Won By Kindness Mrs. Brightwen 203 downloads
- Birds in Town & Village W. H. Hudson 197 downloads
- Fathers of Biology Charles McRae 168 downloads
- On the Genesis of Species St. George Jackson Mivart 166 downloads
- The Dawn of Reason; or, Mental Traits in the Lower Animals Jr. James Weir 160 downloads
- The Wonders of Instinct: Chapters in the Psychology of Insects Jean-Henri Fabre 157 downloads
- Form and Function: A Contribution to the History of Animal Morphology E. S. Russell 154 downloads
- Darwinism (1889) Alfred Russel Wallace 146 downloads
- The Human Side of Animals Royal Dixon 146 downloads
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